Home / 21,418.85-29,554.49-13,455.41

Finding the Fourth Proportional to 21,418.85, 29,554.49 and 13,455.41

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Solution

The fourth proportional to 21,418.85, 29,554.49 and 13,455.41 is: 18,566.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,418.85 : 29,554.49 = 13,455.41 : x
  2. Step 2: Convert to fraction form
    21,418.85/29,554.49 = 13,455.41/x
  3. Step 3: Cross multiply
    21,418.85x = 29,554.49 × 13,455.41
  4. Step 4: Simplify right side
    21,418.85x = 397,667,565.24
  5. Step 5: Solve for x
    x = 397,667,565.24/21,418.85
  6. Step 6: Final answer
    x = 18,566.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.